Merge branch 'mdw/fixes'

* mdw/fixes:
  symm/safer.[ch]: Correct description for `safer_setup'.
  symm/rc4.h: Mention that RC4 isn't really very good.
  symm/rc4.[ch]: Fix incorrect documentation on `rc4_rand'.
  symm/seal.c: Fix IV handling through `gcipher' interface.
  math/mpint.h: Add new conversions.
  math/mpint.[ch]: Consolidate the list of supplied conversions in header.
  progs/rspit.c: Update the baton more frequently if we can.
  progs/rspit.c: Higher resolution timing.
  progs/rspit.c: Handle large requested output.
  progs/rspit.c: Better handling of block cipher IVs.
  progs/rspit.c: Make the internal tables be const.
  rand/rand.[ch]: Spring-clean the random source cryptography.
  rand/rand.[ch]: Don't dynamically construct the global generator.
  symm/multigen: Some UI improvements.
  symm: Expunge stubby header files from the source tree.
  symm/Makefile.am: Modes files listed as `EXTRA_DIST' and `nodist_...'.
  symm/Makefile.am: Have modes things depend on `Makefile.am'.
  symm/modes.am.in: Fix `Generated from ...' header.